A History of the AR-15 Semi-Automatic Rifle & Diplomatic Implications of the Winter Olympics

In the first part of today's show, Mitch Jeserich talks withPatrick Blanchfield about the AR-15 semi-automatic rifle, the same gun that was used to kill every 17 people yesterday at a Florida high-school. Follow Patrick Blanchfield on Twitter at@PatBlanchfield.

Then, we are in conversation with Christine Hongabout what the winter Olympicsmean diplomatically for North Korea, South Korea, and the United States.Christine Hong is an associate professor in the Literature Department and the program in Critical Race and Ethnic Studies at the University of California, Santa Cruz. She is an executive board member of the Korea Policy Institute.